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SPDX is an international standard for documenting software license requirements. Remove the existing headers and replace with a brief SPDX preamble. See: https://spdx.dev/use/specifications/ The script used to convert the files is added to "tools", and the file header templates in headers/ are updated. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* Copyright 1996-2025 The NASM Authors - All Rights Reserved */
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/*
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* common.c - code common to nasm and ndisasm
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*/
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#include "compiler.h"
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#include "nasm.h"
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#include "nasmlib.h"
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#include "insns.h"
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/*
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* Per-pass global (across segments) state
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*/
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struct globalopt globl;
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/*
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* Name of a register token, if applicable; otherwise NULL
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*/
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const char *register_name(int token)
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{
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if (is_register(token))
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return nasm_reg_names[token - EXPR_REG_START];
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else
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return NULL;
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}
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/*
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* Common list of prefix names; ideally should be auto-generated
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* from tokens.dat. This MUST match the enum in include/nasm.h.
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*/
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const char *prefix_name(int token)
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{
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static const char * const
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prefix_names[PREFIX_ENUM_LIMIT - PREFIX_ENUM_START] = {
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"a16", "a32", "a64", "asp", "lock", "o16", "o32", "o64", "osp",
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"rep", "repe", "repne", "repnz", "repz", "wait",
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"xacquire", "xrelease", "bnd", "nobnd", "{rex}", "{rex2}",
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"{evex}", "{vex}", "{vex3}", "{vex2}", "{nf}", "{zu}",
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"{pt}", "{pn}"
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};
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const char *name;
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/* A register can also be a prefix */
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name = register_name(token);
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if (!name) {
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const unsigned int prefix = token - PREFIX_ENUM_START;
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if (prefix < ARRAY_SIZE(prefix_names))
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name = prefix_names[prefix];
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}
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return name;
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}
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/*
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* True for a valid hinting-NOP opcode, after 0F.
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*/
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bool is_hint_nop(uint64_t op)
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{
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if (op >> 16)
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return false;
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if ((op >> 8) == 0x0f)
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op = (uint8_t)op;
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else if (op >> 8)
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return false;
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return ((op & ~7) == 0x18) || (op == 0x0d);
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}
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